A reanalysis of markings on Babylonian tablets has revealed that astronomers working between the fourth and first centuries bc used geometry to calculate the motions of Jupiter—a conceptual leap that historians thought had not…

This week, NASA is set to reach a milestone on one of its most ambitious projects. If all goes to plan, workers will finish assembling the huge mirror of the James Webb Space Telescope—an $8 billion successor to the famous Hubble…

This delicate, glowing flower could one day save your life. It’s the latest example of "4D printing"–3D printed objects that change their shape over time—and it can move in a way that mimics natural processes.